A method for the active adjustment of the profile of a film produced with blown extrusion technology, a film obtained with such method and a reel resulting from the winding of the film.

Described is a system for transferring a dose of polymeric material comprising a head for supplying the polymeric material and at least one conveying device, provided with a conveying wall, which is configured for advancing along a path through the supplying head for transferring to the conveying wall a dose obtained from the polymeric material supplied from the supplying head; and wherein the supplying head comprises a duct which is provided with a straight outfeed region extending along an axis which is configured to supply the polymeric material to a supplying outfeed. The outfeed region comprises at least a first zone and a second zone facing each other, the supplying head having at least one variation configuration in which the first zone and the second zone are asymmetrical to disturb a flow of polymeric material in the outfeed region in such a way as to control the supplying direction of the polymeric material, supplied from the supplying outfeed and to transfer to the conveying wall. A method is also proposed for transferring the dose of polymeric material from the supplying head to the conveying device and a method for supplying the dose.

A pelletizing apparatus includes a filter device connected with a melt feed, a granulator downstream of the filter device, particularly an underwater granulator, a water treatment device, and a control means for controlling the filter device, underwater granulator, and water treatment device and adapted to provide at least one control parameter. The apparatus includes at least one machine-readable and -writable identification means for storing and providing an item of component-specific information and being associated with a component in the flow path of the melt or the process water, and a reading device communicating with the control means to receive the component-specific information from the identification means, and a writing device to write the identification means with the component-specific information, the control means to adapt the control parameter based on the component-specific information to provide the component-specific information, and, based on the component-specific information, to execute a diagnostic process.

A continuous cycle system for moulding single objects from plastic material, including: an extruder including a cylinder extending along a longitudinal axis (L), a screw rotating inside the cylinder about the longitudinal axis (L), the screw having a core and a thread externally coupled to the core and heaters coupled to the cylinder; a moulding machine, configured to receive as input the flow of liquid plastic material from the extruder and including a plurality of moulds, each having a first and a second half mould movable relative to each other between an open position and a closed position.

The method for setting an operating point of a film stretching system comprises the method steps: acquiring an input, wherein the input contains: a) a target value for the first production variable; or b) a target value for the second production variable; or c) a target value for the third production variable; specifying: a) a setting value for the second production variable and the third production variable in order to achieve the target value for the first production variable; or b) a setting value for the first production variable and the third production variable in order to achieve the target value for the second production variable); or c) a setting value for the first production variable and the second production variable in order to achieve the target value for the third production variable; controlling the motor arrangement and the extruder arrangement by the control device in such a way that the operating point consisting of the target value and two setting values is reached.

The method for setting an operating point of a film stretching system comprises the method steps: acquiring an input, wherein the input contains: a) a target value for the first production variable; or b) a target value for the second production variable; or c) a target value for the third production variable; specifying: a) a setting value for the second production variable and the third production variable in order to achieve the target value for the first production variable; or b) a setting value for the first production variable and the third production variable in order to achieve the target value for the second production variable); or c) a setting value for the first production variable and the second production variable in order to achieve the target value for the third production variable; controlling the motor arrangement and the extruder arrangement by the control device in such a way that the operating point consisting of the target value and two setting values is reached.

A strand manufacturing apparatus capable of reducing variations among diameters of resin strands without stopping the operation of an extruder is provided. A strand manufacturing apparatus includes a die in which an outflow hole for discharging a resin material contained in an extruder as a string-shaped resin strand is formed, an adjustment valve configured to adjust opening of the outflow hole, an image acquisition unit configured to acquire an image of the resin strand extruded from the outflow hole, a diameter acquisition unit configured to acquire a diameter of the resin strand in the image, and an opening adjustment unit configured to adjust the opening by driving the adjustment valve based on the diameter of the resin strand acquired by the diameter acquisition unit.

A method for the active adjustment of the profile of a film produced with blown extrusion technology, a film obtained with such method and a reel resulting from the winding of the film.

Provided is a thickness variation adjustment-type air ring capable of accurately and optimally controlling the volume of cooling air at all positions in the circumferential direction, and stably manufacturing a synthetic resin film having an exceptionally low thickness variation. A thickness variation adjustment-type air ring is provided on a die of an inflation film manufacturing apparatus which locally controls the volume of cooling air discharged from a cooling air passage in a circumferential direction to adjust the thickness variation of a synthetic resin film when blowing the cooling air around a molten synthetic resin tube extruded in a longitudinal direction to cool and solidify the molten synthetic resin tube to form the synthetic resin film, the thickness variation adjustment-type air ring. The thickness variation adjustment-type air ring includes: a ring-shaped passage adjustment portion arranged sequentially in the circumferential direction inside of the cooling air passage; and a plurality of moving portions connected at a predetermined position in the circumferential direction of the passage adjustment portion so as to move a connecting portion of the passage adjustment portion in a predetermined direction independently from other portions, wherein a space in which cooling air can circulate inside the cooling air passage is locally adjusted in the circumferential direction and the volume of cooling air is locally controlled in the circumferential direction.

A strand manufacturing apparatus capable of reducing variations among diameters of resin strands without stopping the operation of an extruder is provided. A strand manufacturing apparatus includes a die in which an outflow hole for discharging a resin material contained in an extruder as a string-shaped resin strand is formed, an adjustment valve configured to adjust opening of the outflow hole, an image acquisition unit configured to acquire an image of the resin strand extruded from the outflow hole, a diameter acquisition unit configured to acquire a diameter of the resin strand in the image, and an opening adjustment unit configured to adjust the opening by driving the adjustment valve based on the diameter of the resin strand acquired by the diameter acquisition unit.